This change is inspired by commit openwrt/openwrt@38b22b1e ("nghttp2:
deduplicate files in libnghttp2")

The packages in this commit are identified with the following command

	grep -rin -E 'INSTALL_(DATA|BIN)' | grep -F '.so' | grep -F '*'

Some of them do not have symlinks and are not affected, but the change
is still applied for consideration of best practices just in case

Signed-off-by: Yousong Zhou <yszhou4tech@gmail.com>

Some of them forgot to update MIRROR_HASH on version change, others
updated with wrong hash value.  The new values were generated from
tarballs prepared by the newly introduced github-tarball download
methoded and confirmed consistent with those from sources.openwrt.org

Signed-off-by: Yousong Zhou <yszhou4tech@gmail.com>

From the package description:
PageKite is a system for running publicly visible servers (generally
 web servers) on machines without a direct connection to the Internet,
 such as mobile devices or computers behind restrictive firewalls.
 PageKite works around NAT, firewalls and IP-address limitations by
 using a combination of tunnels and reverse proxies.

 This package provides an implementation of the PageKite Protocol in C,
 optimized for high-performance or embedded applications.

Signed-off-by: Karl Palsson <karlp@tweak.net.au>